X-ray Transmission Characteristics Based on Numerical Model of Upper Atmosphere

LÜ Zhihui; WEI Fei; ZHANG Xuanyi; PENG Songwu; FENG Pengyuan

doi:10.11728/cjss2023.04.2022-0063

Volume 43 Issue 4

Jul. 2023

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Article Navigation > Chinese Journal of Space Science > 2023 > 43(4): 640-646 Open Access

LÜ Zhihui, WEI Fei, ZHANG Xuanyi, PENG Songwu, FENG Pengyuan. X-ray Transmission Characteristics Based on Numerical Model of Upper Atmosphere (in Chinese). Chinese Journal of Space Science, 2023, 43(4): 640-646 doi: 10.11728/cjss2023.04.2022-0063

Citation:

LÜ Zhihui, WEI Fei, ZHANG Xuanyi, PENG Songwu, FENG Pengyuan. X-ray Transmission Characteristics Based on Numerical Model of Upper Atmosphere (in Chinese). Chinese Journal of Space Science, 2023, 43(4): 640-646 doi: 10.11728/cjss2023.04.2022-0063

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X-ray Transmission Characteristics Based on Numerical Model of Upper Atmosphere

doi: 10.11728/cjss2023.04.2022-0063 cstr: 32142.14.cjss2023.04.2022-0063

LÜ Zhihui^{1, 2, 3
,},
WEI Fei^{1, 2, 3},
ZHANG Xuanyi^{1, 2, 3},
PENG Songwu^{1, 3},
FENG Pengyuan^{1, 3}

1.
National Space Science Center, Chinese Academy of Sciences, Beijing 100190
2.
University of Chinese Academy of Sciences, Beijing 100049
3.
Beijing Key Laboratory of Space Environment Exploration, Beijing 100190

Received Date: 2022-11-03
Accepted Date: 2023-06-25
Rev Recd Date: 2023-03-10

Available Online: 2023-06-25

Abstract

Abstract

Most of the energy of a nuclear explosion is released in the form of X-ray. It is important to understand the characteristics of the X-ray radiation for the monitoring of space-based nuclear explosion events and the calculation of explosion yield. In this paper, the blackbody radiation model is constructed based on the X-ray energy spectrum characteristics of nuclear explosion, and a stratified atmospheric numerical model is constructed based on the NRLMSIS atmospheric model composition data and height density data. The stratified atmospheric mass absorption coefficient model is combined with the NIST database to improve the accuracy of the atmospheric model and the atmospheric mass absorption coefficient model. The transmission characteristics of X-ray in the atmosphere are studied using the code, and the energy spectral characteristics of X-ray generated by nuclear explosions at near-space altitude were simulated, after atmospheric absorption and assuming the energy injection at different altitude points. The results show that the height of the detection point is constant, the smaller the slant angle the larger the ray transmission path, i.e., the longer the atmospheric absorption path that the ray passes through, and thus the more the peak of the energy spectrum will shift to the higher energy. At the same height, the energy fluence is the largest directly above the explosion point, and the energy fluence at other positions decays exponentially as the angle decreases.
- Atmospheric numerical model,
- X-ray,
- Atmospheric absorption,
- Energy spectrum,
- Energy injection

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References(23)

References

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